I have been hoping those more knowledgeable, would have offered assistance.. this is not my expertise.. It almost sounds like the equivalent of a laptop connection. you can use a swich on a laptop to create the connection. so maybe you can do the same with the tower.. see if this helps you at all. and hopefully.. those who are better at this.. can jump in and give you much better advice.. .. good luck, txgsent..
this is how you do a laptop...
http://www.ftaconcept.com/showthread.php?t=36455